Plz rephrase this

Hallo
I have tried to rephrase a paragraph below. How else can I do it?

"The coach never changed the fresher's natural style. But he only finetuned it.He helped him to develop the right kind of temperament for the game."

1 The coach never interfered with the original[or individual,own] way the beginner played the game.He only streamlined his technique....[I can't do the last line because I don't know how to.]


thank you.